A. This is a high-field MRI scan of the entire brain of a mouse that received the transplant of human stem cells (HuCNS-SCs; spinal cord is at lower left and the front of the brain is far right)
B. The red color identifies regions in white matter where the MRI signal predicted that stem cells made new myelin. Green areas predicted no myelin.
C. An analysis for human myelin was done in the region of the brain seen on the MRI in red and green in panel B. Regions in white confirmed that myelin was present where predicted by the MRI signal in panel B.